The patch titled
raid5_end_write_request() spinlock speedup
has been added to the -mm tree. Its filename is
raid5_end_write_request-spinlock-fix.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Coywolf Qi Hunt <qiyong@xxxxxxxxx>
Reduce the raid5_end_write_request() spinlock window.
Signed-off-by: Coywolf Qi Hunt <qiyong@xxxxxxxxx>
Cc: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/md/raid5.c | 7 ++-----
1 files changed, 2 insertions(+), 5 deletions(-)
diff -puN drivers/md/raid5.c~raid5_end_write_request-spinlock-fix drivers/md/raid5.c
--- 25/drivers/md/raid5.c~raid5_end_write_request-spinlock-fix Fri Apr 21 14:59:14 2006
+++ 25-akpm/drivers/md/raid5.c Fri Apr 21 14:59:14 2006
@@ -581,7 +581,6 @@ static int raid5_end_write_request (stru
struct stripe_head *sh = bi->bi_private;
raid5_conf_t *conf = sh->raid_conf;
int disks = sh->disks, i;
- unsigned long flags;
int uptodate = test_bit(BIO_UPTODATE, &bi->bi_flags);
if (bi->bi_size)
@@ -599,16 +598,14 @@ static int raid5_end_write_request (stru
return 0;
}
- spin_lock_irqsave(&conf->device_lock, flags);
if (!uptodate)
md_error(conf->mddev, conf->disks[i].rdev);
rdev_dec_pending(conf->disks[i].rdev, conf->mddev);
-
clear_bit(R5_LOCKED, &sh->dev[i].flags);
set_bit(STRIPE_HANDLE, &sh->state);
- __release_stripe(conf, sh);
- spin_unlock_irqrestore(&conf->device_lock, flags);
+ release_stripe(sh);
+
return 0;
}
_
Patches currently in -mm which might be from qiyong@xxxxxxxxx are
raid5_unplug_device-fix.patch
raid5_end_write_request-spinlock-fix.patch
-
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